GHSA-J63G-H4GQ-Q67F

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-23 15:32
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

ipmi: fix refcount leak in i_ipmi_request()

When a caller provides a supplied_recv message to i_ipmi_request(), the function increments the user's nr_msgs reference count. If an error occurs later, the out_err cleanup path only frees the recv_msg if the function allocated it itself (i.e., !supplied_recv). In the supplied_recv case the cleanup is skipped, leaving the reference count elevated. The caller ipmi_request_supply_msgs() does not release the supplied_recv on error, so the reference is permanently leaked.

Fix this by explicitly reverting the reference count operations when a supplied recv_msg with a valid user pointer is present in the error path: decrement nr_msgs and drop the user's kref.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72040"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:13Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: fix refcount leak in i_ipmi_request()\n\nWhen a caller provides a `supplied_recv` message to i_ipmi_request(),\nthe function increments the user\u0027s `nr_msgs` reference count. If an\nerror occurs later, the out_err cleanup path only frees the recv_msg\nif the function allocated it itself (i.e., !supplied_recv). In the\nsupplied_recv case the cleanup is skipped, leaving the reference count\nelevated. The caller ipmi_request_supply_msgs() does not release the\nsupplied_recv on error, so the reference is permanently leaked.\n\nFix this by explicitly reverting the reference count operations when a\nsupplied recv_msg with a valid user pointer is present in the error\npath: decrement nr_msgs and drop the user\u0027s kref.",
  "id": "GHSA-j63g-h4gq-q67f",
  "modified": "2026-08-23T15:32:58Z",
  "published": "2026-08-15T06:32:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72040"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0fd23994ec8c5436d9f0b50848deb87ed933e6b3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/122ca6b2af714e114c9b872a48372ace31a9ab1f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9409e18ffe7378d202efe1cf69989df9f67b0369"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3f3859cecacb64f18fd446271ece9a3b3f2d4de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2a3b77df6aef031455dd83ea8ed4344b7dca1f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5c5065963024390ddad51bd455d1adc710de575"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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